1From Thomas Jefferson to Mary Jefferson, 25 July 1790 (Jefferson Papers)
No letter from you yet, my dear Maria. You now owe me four, and I insist on you writing me one every week till you shall have paid the debt. I write to you every three weeks, and I think you have quite as little to do as I have, so that I may expect letter for letter. The account stands at present as follows. Maria Jefferson Dr. to Th: Jefferson Cr. April 11. To letter of this date 1 April 25....